AirCalc Psychrometric — HVAC Calculator for Engineers
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Response time: We typically respond within 24–48 hours.
AirCalc Psychrometric is a professional psychrometric calculator that computes moist air properties. Given any two parameters (such as dry bulb temperature and relative humidity), it calculates all other psychrometric values including enthalpy, dew point, wet bulb temperature, humidity ratio, specific volume, and absolute humidity.
Yes. All calculations are performed locally on your device. No internet connection is required.
You can use any 2 of the 8 parameters as inputs: Dry Bulb (DB), Relative Humidity (RH), Absolute Humidity (AH), Humidity Ratio (W), Dew Point (DP), Wet Bulb (WB), Enthalpy (H), and Specific Volume (V). Note: the combination of W + DP is not supported as they cannot uniquely define an air state.
The app is designed for dry bulb temperatures from -20°C to 90°C. Results outside this range may have reduced accuracy.
Yes. Go to the Settings tab and select your preferred temperature unit. The app also supports switching between kPa and atm for pressure.
AirCalc Psychrometric supports 8 languages: English, 日本語 (Japanese), 中文 (Chinese), 한국어 (Korean), ไทย (Thai), Tiếng Việt (Vietnamese), Deutsch (German), and Español (Spanish).
Navigate to the Chart tab to view an interactive psychrometric diagram. You can tap or drag anywhere on the chart to set the air state. The chart displays relative humidity curves (10%–100%) and constant enthalpy lines. The tooltip near the point shows the current values.
The app uses standard psychrometric equations including the Magnus formula for saturation vapor pressure, and Newton-Raphson iteration for wet bulb temperature. Calculations are based on standard atmospheric pressure (101.325 kPa) unless changed in settings.